TM 10-3930-675-24-1
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0017 00
Table 24. Error Code
422 -
Cab in
Transport Proximity
Switch, Circuit Input Error Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 422 - Cab in Transport Proximity
Switch, Circuit Input Error.
Error code 422 is an information type error code. It
may not activate for the operator. Enter DIAG STEER-
ING 2(16) in the Diagnostic menu to verify the code or
enable the information type codes in the initialization
menu. Input error type codes can be activated if the
voltage input is not stable due to a bad connection.
1. Inspect the cab transport Replace damaged cab in transport
proximity switch (7210) proximity switch (WP 0076 00).
located at the right rear of cab
for damage.
2. Check for proper operation.
Proximity switch should not
Place cab in transport position
extend beyond the end of the
(TM 10-3930-675-10) and
protective enclosure. Adjust
check for proper gap and
proximity switch or cab to obtain
engagement of proximity
the proper gap (5 mm) (WP 0076
switch against the frame.
00 and WP 0138 00).
3. Inspect connectors X175, a. Repair or replace damaged
X195, A174, A47, and X174B
connector (WP 0113 00).
(RESET or USMC) for b. If connectors are found to be in
connection damage.
good condition, check wires
00-30), A1743C, A1743D
A174B1B and A174B1C
00-29) and A1743B, A1743C,
A174B1A, A475, and 475
c. Replace or repair open or
damaged wire.
4. Check ECU (792) pin 43 for a. Check wire A1752 for
b. Replace damaged ECU (792)
terminal board (WP 0080 00).
5. Check
wire
connection. a. Replace ECU (792) (WP 0080
Disconnect wire A1752 from
00) if error code 422 is still
ECU (792) and recheck for
active.
active 422 error code.
b. Replace proximity switch
(7210) (WP 0076 00).
0017 00-19